All the time. Sometimes 2-3 times a week. Otherwise with the amount of bags I have some would never get used in my lifetime! 
It also keeps any one bag from really getting any wear and tear to it. This works well for shoes too. I have the Joey Jr purse organizers I swap from bag to bag and cosmetics in cute pouches which I also change around for variety.
My husband is about to put together a "purse closet" for me to make it easier to access bags that are in heavier rotation. I can't wait for that!

It also keeps any one bag from really getting any wear and tear to it. This works well for shoes too. I have the Joey Jr purse organizers I swap from bag to bag and cosmetics in cute pouches which I also change around for variety.
My husband is about to put together a "purse closet" for me to make it easier to access bags that are in heavier rotation. I can't wait for that!